Mike Ehrmantraut

Season 2

Mike first appears after he is sent to remove all evidence of drugs from Jesse's apartment and to coach him on how to interact with the authorities after Jesse wakes from his heroin-induced sleep to find his girlfriend Jane dead, having choked on her own vomit.

Season 3

Saul Goodman hires Mike to spy on Skyler White , which he is doing when Tuco Salamanca's dangerous cousins, Leonel and Marco show up to murder Walt in revenge for Tuco's death. Mike calls Victor and has him tell Gus to intervene with the cartel. The cousins then receive a text message reading "Pollos", which they understand as an instruction not to act, so they leave without Walt knowing they had been in his house. Walt later intends to kill Gale, knowing that with Gale in possession of Walt's meth formula, Gus considers Walt expendable. Victor and Mike are supposed to protect Gale, but Jesse succeeds in killing Gale in order to save Walt.

Season 4

Mike helps Gus in strongarming Walt and Jesse into the lab, and watches as Gus kills Victor with a box cutter to demonstrate to Walt and Jesse that they are expendable. Mike continues Victor's duties in monitoring the pair in the superlab. Based on Mike's observations, Gus believes they can create dissent between Walt and Jesse, and has Mike start grooming Jesse by bringing him along on various dead-drop pickup missions and drug deliveries. Jesse proves himself to Mike and takes an initiative to help, impressing Mike and Gus. Gus brings Mike and Jesse to a meeting with Don Eladio and the Mexican cartel, offering them Jesse to remain to cook the blue meth in the cartel's own lab. However, this was a rouse for Gus to poison Don Eladio and the cartel; the cartel bodyguards start firing on them, and Mike and Jesse work to protect Gus as they flee. In a makeshift medical tent, Gus is treated for his wounds, and he and Jesse return to Albuquerque, while Mike's wounds require him to stay grounded for a few more days.

While Mike recovers, Gus has Walt removed from the lab, putting Jesse in charge. Walt, fearing for his and his family's life, frantically works to find a way to eliminate Gus. He does this by convincing Jesse that Gus had poisoned his girlfriend's son Brock with ricin, and making a deal with Hector Salamanca, a long-term foe to Gus. Walt's actions lead to Gus being lead into an trap within Hector's room, where Hector kills them both with a pipe bomb made by Walt. Walt and Jesse set the superlab aflame once free of Gus's influence.

Season 5

Mike returns and learns of Gus' death, quickly blaming Walt and Jesse, but Walt points out that security footage on Gus' computer, in police evidence, will implicate Mike too. The three work to destroy the evidence, and Walt and Jesse suggest a partnership to start a new meth operation. Mike initially refuses, but then is contacted by Lydia Rodarte-Quayle, a Madrigal executive that has been supplying the materials for the meth operation. Lydia asks to kill his associates that knew of Gus' operation to protect it, but Mike asserts that Gus has previously arranged a way to pay these associates off via off-shore accounts created before his death. However, these accounts become seized by the DEA investigation into Gus, and Lydia contacts one of Mike's associates to carry out the executions. Mike kills the associate first, and, instead of killing Lydia, blackmails hers to help to continue to supply the methylamine for Walt and Jesse's operation, while agreeing to help support Walt and Jesse.

After suspecting the DEA is tracking the shipment of methylamine barrels, Lydia suggests a means to steal methylamine from tanker cars, and provides Mike the details. The theft goes as planned, but when a local boy witnesses them, Todd kills him. Mike and Jesse decide to cash out by selling their share of the methylamine to another dealer, Declan and Mike tells Walt he will pay his associates from his share. Walt continues to partner with Declan, and accumulates a sizeable fortune. The ongoing DEA investigation into Gus connects him to Mike, and agents acquire a search warrant for Mike's home. Mike stashes his money and other necessary items in a "go bag" that he hides in an airport parking lot, and the DEA find nothing in his home. Their continued investigation leads them to Dan Wachsberger, who acts as Mike's go-between in paying off his associates. Walt learns the DEA is investigating Dan and warns Mike. Mike flees and asks Walt to meet him with the "go bag". Walt meets Mike but refuses to turn over the bag unless Mike reveals the names of his associates. Mike refuses, and Walt angrily grabs the gun from Mike's bag and shoots him. Walt apologizes, realizing he could have asked Lydia for the names, but Mike tells Walt to leave him alone to let him die in peace.^[2] Walt ends up disposing of Mike's body with hydrofluoric acid.

Season 1

Mike, a former Philadelphia police officer now relocated to Albuquerque to be close to his daughter-in-law and granddaughter, works as a parking lot attendant at the courthouse, where he meets Jimmy. He also does private investigating, security and "muscle" jobs on the side, including helping Jimmy out with the Kettlemans, a family involved in embezzlement. After serving as a bodyguard for Daniel "Pryce" Wormald, a naïve drug company employee who wants to sell pills stolen from his employer, he finds himself dealing with Pryce's buyer Nacho Varga, a key figure within the Salamanca drug cartel.

Season 2

Impressed by Mike's work for Pryce, Nacho approaches him with a request to kill Tuco Salamanca, Hector's nephew, because his erratic actions are drawing unnecessary attention to the Salamanca's operations. Mike fears the cartel will find out and kill him. Instead, he fakes an altercation with Tuco that leads to Tuco being imprisoned for assault with a deadly weapon. Hector doesn't object to Tuco spending a small amount of time in prison as a learning experience, but bribes Mike to say the gun was his, which reduces Tuco's sentence. Mike's dealings with Hector make him think Hector suspects he intentionally caused Tuco's arrest, causing Mike to feel uneasy about the safety of his daughter-in-law and granddaughter. He attempts to draw the police into investigating Hector's drug business by causing one of Hector's cargo trucks to crash and stealing the $250,000 hidden inside one of the tires, while leaving the driver tied up by the side of the road. Mike intended for a passer-by to call the police, but finds out from Nacho that when a passing motorist stopped and aided the driver, the driver called Hector. Hector then dispatched a crew to clean up the scene, including killing the good Samaritan so that the drug ring wouldn't be exposed. Mike then prepares to assassinate Hector, but an unseen third party disrupts his plan.

Season 3

Mike assumes someone used a tracking device to identify his location and prevent him from killing Hector. He dismantles his car at a mechanic's shop but fails to find a tracker until he has an epiphany and discovers it inside the gas cap. Obtaining an identical tracker from Caldera, he replaces the one in his gas cap, drains the battery of the one he removed from his car, and waits. Someone arrives at Mike's house to replace the tracker on Mike's car, believing the battery is dead. Mike follows him, and sees him drop the tracker off at Los Pollos Hermanos. Mike discovers that it was Gus Fring who warned him not to kill Hector, because Gus wants to take over Hector's drug business and believes the time is not yet right. Mike continues surreptitious disruption of Hector's drug shipments, while Nacho, who wants to save his father from Hector's plans to use the family's car restoration and customization business as a drug front, switches Hector's heart medication with ibuprofen in the hopes of killing him without detection by inducing a fatal heart attack. Gus agrees to help Mike launder the $250,000 he stole from Hector by taking the cash and arranging for Madrigal Electromotive, a front company involved in Gus' drug business, to pay it back to Mike as monthly contracted security consultant fees. In a sign of Gus' respect for Mike and expectation of a future working relationship, he absorbs the cost of the withholding taxes Mike will have to pay, so that Mike won't sustain a financial loss as a result of the laundering.

Season 4

Mike leaves his job as a parking lot attendant at the courthouse and performs actual consulting for Madrigal Electromotive. On his first site visit, he poses as an employee, but eventually reveals himself and begins to list the security violations he's uncovered. Lydia attempts to convince Mike to stop, but Mike indicates he'll keep doing inspections as a plausible cover for the payments he's receiving. When Lydia complains to Gus, he gives tacit approval for Mike to continue. At a job interview, Jimmy spots an opportunity to steal a valuable Hummel figurine, and calls Mike to enlist his aid. Mike refuses, forcing Jimmy to look elsewhere. Mike continues to attend group therapy meetings with Stacey. He realizes that Henry, another member of the group is lying about having a wife who died. Mike confronts Henry in a session, leading Henry to walk out and causing a temporary rift between Stacey and Mike. Mike escorts foreign engineers through the industrial laundry so they can evaluate the area underneath for suitability as an underground meth lab. Gus selects one, Werner Ziegler, to plan and oversee construction, and Mike arranges for housing and amenities that enable the crew to work at night and avoid detection. When the construction job falls behind schedule, Werner effects an escape and plans a rendezvous with his wife. Mike catches up to Werner, persuades him to have his wife return to Germany for her own safety, and then kills him.